The invention relates to the technical field of building materials, in particular to an autoclaved sand-lime brick. The autoclaved sand-lime brick is prepared from raw materials in parts by weight asfollows: 30-50 parts of fly ash, 15-28 parts of lime, 8-16 parts of perlite, 12-20 parts of glass slag, 1-5 parts of ceramsite, 3-17 parts of modified nitrile rubber particles and 1-9 parts of a curing agent. The autoclaved sand-lime brick is prepared from industrial waste as a main raw material, waste of land resources and pollution to water and atmosphere are reduced, and production cost is low;with addition of the modified nitrile rubber particles, corrosion resistance of the autoclaved sand-lime brick is effectively improved; by means of addition of the curing agent, strength and anti-frost property of the autoclaved sand-lime brick are effectively improved.